Don't worry. They figured it out before they got too friendly.
A CLEANER signed up to a website and ended up on a blind date - with her long-lost brother.
Sarah Kemp, 42, swapped emails and photos with 47-year-old George Bentley.
But it was only when they met in a pub on their first date and talked about their childhood that they realised they were brother and sister.
Luckily, the penny dropped before any "kisses or fumbles" took place.